&clipidIf you haven't seen it, listen for a minute to Mythbuster's Adam Savage on the subject of giving a robot a weapon.
(Adam Savage discusses weaponized robotics)
Science fiction writers also seem to come down on the same side, as far as armed robots are concerned; Philip K. Dick's claws (from Second Variety 1953) and the ED-209 (from Robocop 1987) are just two examples.
Of course, the other point of view has been presented. Consider the intelligent and virtuous Bolo tanks from Keith Laumer's works.
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Illustrating Classic Heinlein With AI
'Stasis, cold sleep, hibernation, hypothermia, reduced metabolism, call it what you will - the logistics-medicine research teams had found a way to stack people like cordwood and use them when needed.'
Deflector Plasma Screen For Drones ala Star Wars
'If the enemy persists in attacking or even intensifies their power, the density of the plasma in space will suddenly increase, causing it to reflect most of the incoming energy like a mirror.'